Device for detecting air-fuel ratio of engine

Details Device for detecting air-fuel ratio of engine Device for detecting air-fuel ratio of engine

1986-05-21

1988-08-30

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204412, 204425, 123440, 123489, G01N 2758

Patent

active

047675209

ABSTRACT:
A device for detecting the air-fuel ratio of an engine by measuring the oxygen concentration of the exhaust gas by means of an oxygen sensor including an oxygen pump and a cell element for measuring the oxygen concentration ratio, comprising a filter circuit for smoothing the output signal of the oxygen sensor, said filter circuit having a time constant which is variably set so that it is in proportional relation to the number of revolutions per units of time of the engine.

REFERENCES:
patent: 4440621 (1984-04-01), Kitahara et al.
patent: 4534330 (1985-08-01), Osuga et al.
patent: 4601273 (1986-07-01), Kitahara et al.
patent: 4601276 (1986-07-01), Danson et al.
patent: 4609453 (1986-09-01), Shimomura
patent: 4658790 (1987-04-01), Kitahara

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